Liminal Craft: Backrooms Add-on 1.21+

Liminal Craft: Backrooms is an add-on that brings new entities, blocks, and items to the game so you can create your own Backrooms-style worlds. The mod strives to preserve the familiar vanilla look and makes each entity useful for building or decorating spaces. It is focused on map creation and is perfect for those who want to assemble locations themselves and experiment with different construction options.